I cannot seem to get the Linux machine's domain name to be used, but instead it is using "localdomain". I took over these duties from a prior employee whose server was "almost ready" has the same issue. So I created test VM and made the minimal changes from the NULL client info shared on the Postfix site. I am using the current version of Postfix that is available from my distribution. This is an internal server for a single domain so nothing fancy. Just took the default main.cf and changed the myorigin = $mydomain, mydestination = , (nothing after the =), set the relayhost = $mydomain so it would use MX, reloaded the configuration and even restarted the service.
Running hostname -f shows the correct fully qualified domain that I expect. So based on the information in the main.cf I think Postfix should use the domain found there. Running postconf -d myhostname returns the host.localdomain where the host is the correct hostname, but localdomain is just the string "localdomain" Since this is a null client setup I would not like to hard code the server name. But I went ahead and set mydomain to my domain and this did not correct the issue. I even tried setting myhostname to the FQDN and I still see the "localdomain" instead. I am stumped on where Postfix is getting that domain? (And yes, after making these changes I reloaded the configuration and even restarted the service). Any suggestions on what I am overlooking?
